Added initialization tests to warm up JIT compilation and ensure basic functionality.

Author: RyanLamansky

SqlServerSimulator.Tests.EFCore/EFCoreBasics.cs

@@ -5,6 +5,21 @@ namespace SqlServerSimulator;
 [TestClass]
 public class EFCoreBasics
 {
+    [AssemblyInitialize]
+    public static async Task HotPath(TestContext context)
+    {
+        if (System.Diagnostics.Debugger.IsAttached)
+            return;
+
+        // Triggers JIT compilation of the most common path among all tests, improving the accuracy of their timings.
+        // Also functions as a sanity check against the simulator being completely broken.
+        using var dbContext = new TestDbContext();
+
+        Assert.IsEmpty(dbContext.Rows.Select(x => x.Id).AsEnumerable());
+
+        Assert.AreEqual(0, await dbContext.SaveChangesAsync(context.CancellationToken));
+    }
+
     public static Simulation CreateDefaultSimulation()
     {
         var simulation = new Simulation();
@@ -21,11 +36,11 @@ class TestRow
         public int Id { get; set; }
     }
 
-    class TestContext(Simulation simulation) : DbContext
+    class TestDbContext(Simulation simulation) : DbContext
     {
         public Simulation Simulation { get; set; } = simulation;
 
-        public TestContext()
+        public TestDbContext()
             : this(CreateDefaultSimulation())
         {
         }
@@ -41,7 +56,7 @@ protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
     [TestMethod]
     public void InsertRowSync()
     {
-        using var context = new TestContext();
+        using var context = new TestDbContext();
 
         var row = new TestRow { Id = 1 };
 
@@ -57,7 +72,7 @@ public void InsertRowSync()
     [TestMethod]
     public async Task InsertRowAsync()
     {
-        await using var context = new TestContext();
+        await using var context = new TestDbContext();
 
         var row = new TestRow { Id = 1 };
 
@@ -72,7 +87,7 @@ public void RoundTrip()
         var simulation = CreateDefaultSimulation();
         const int storedValue = 3;
 
-        using (var context = new TestContext(simulation))
+        using (var context = new TestDbContext(simulation))
         {
             var row = new TestRow { Id = storedValue };
 
@@ -81,7 +96,7 @@ public void RoundTrip()
             _ = context.SaveChanges();
         }
 
-        using (var context = new TestContext(simulation))
+        using (var context = new TestDbContext(simulation))
         {
             var receivedValue = context.Rows.Select(x => x.Id).AsEnumerable();
 

SqlServerSimulator.Tests/QualityTests.cs

@@ -3,7 +3,18 @@
 [TestClass]
 public class QualityTests
 {
-    [TestMethod()]
+    [AssemblyInitialize]
+    public static void HotPath(TestContext context)
+    {
+        if (System.Diagnostics.Debugger.IsAttached)
+            return;
+
+        // Triggers JIT compilation of the most common path among all tests, improving the accuracy of their timings.
+        // Also functions as a sanity check against the simulator being completely broken.
+        Assert.AreEqual(1, new Simulation().ExecuteScalar<int>("select 1"));
+    }
+
+    [TestMethod]
     [Description("Prevents unintentional expansion of the public API.")]
     public void PublicApiWhitelist()
     {

SqlServerSimulator.Tests/SelectTests.cs

@@ -5,10 +5,6 @@ namespace SqlServerSimulator;
 [TestClass]
 public class SelectTests
 {
-    [TestMethod]
-    public void Select1ViaExecuteScalar()
-        => Assert.AreEqual(1, new Simulation().ExecuteScalar("select 1"));
-
     private static DbDataReader ScalarViaReaderTest(string commandText)
     {
         var reader = new Simulation().ExecuteReader(commandText);